56 55. Flood PlainA plain along a river; formed by sediment from floods.

57 56. Alluvial FanSloping where a stream slows down, into a level plain.

58 57. LongitudeImaginary lines that run through both poles (N/S). The central line of longitude is called the Prime Meridian and it runs through the Royal Observatory in Greenwich, England. Lines tell us how far east and west we are from the PM.

59 58. LatitudeImaginary lines which tell us how far north or south one is from the Equator; the imaginary line exactly ½ way between N and S poles.

60 59. Prime MeridianCentral line of longitude that runs through N and S poles; Greenwich, England.